Merge "Use activity-exit animation for translucent-only close" into udc-dev...

Merge "Use activity-exit animation for translucent-only close" into udc-dev am: d31c9412 am: f18fce66 am: 2299f1df

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23439461



Change-Id: Ib029d3a435e446c203961e61ab8a3a9e32648445
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>